UDATE:Need help. Lost exhaust and air pressure regulation.

Tow truck operators who typically tow BIG vehicles are pretty good about doing so with no damage to the towed vehicle. They use an air hose from their truck to connect to your air system to release the spring brakes. It is also necessary to disconnect the rear "drive" axle, but they know how to do this very quickly. I had a tow truck pick up a 40' DP and tow it 300 miles to my shop to be repaired. It is done all the time.